S-91253A632 3/8"-16 x 2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating that protects against rust and extends service life in demanding environments
• Exceptional mechanical strength with 130,000 psi tensile strength and Rockwell C39 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 3A fit ensuring secure fastening and vibration resistance in critical assemblies
• Optimized flush mounting with 82° countersink angle and flat head design for seamless surface integration and improved aesthetics
• Enhanced installation efficiency through hex drive design providing superior torque transmission and reduced tool slippage
• Full-thread coverage along the 2" length enables maximum grip strength and load distribution across connected components
• Industry-standard compliance meeting ASME B18.3 and ASTM F835 specifications for guaranteed interoperability and quality assurance

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver critical engineering solutions where surface flushness and high-strength fastening are paramount. The black-oxide alloy steel construction provides superior protection against corrosion in industrial environments, while the Class 3A thread fit ensures precise engagement that resists loosening under vibration and dynamic loads. The 82° countersink angle allows perfect flush mounting in machinery, automotive assemblies, and structural frameworks where protruding fasteners are unacceptable. With full threading along the entire 2" length, these hex drive screws distribute clamping force evenly, making them ideal for heavy-duty applications requiring consistent tension and reliable performance in manufacturing equipment, construction frameworks, and transportation systems.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread spacing for optimal engagement. These flat head screws comply with ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and mechanical performance. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, confirming the absence of restricted substances for safe industrial use worldwide.